If you want to disturb your friend then make warning box using following given text on your friend’s laptop.

It is not harmful for  your laptop.

Step1:

Open notepad

Step2:

write following text in notepad.

X=msgbox("message",1,"title")

Step3:

save it as anyname.vbs like has.vbs and open it .It will see very beautiful.

Example:-

Open notepad and write this text .

X=msgbox("your computer is in risk So press ok and suddenly shutdown your computer otherwise your computer will be blast in 5 minutes",1,"Warning")

And save it as anyname.vbs like has.vbs. It is very  interesting.

Please see attachment if you want to know how it is display.